| HAL : hal-00402455, version 2 |
| DOI : 10.1016/j.laa.2009.11.022 |
| Fiche détaillée | Récupérer au format |
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| Linear Algebra and its Applications 432, 7 (2010) 1663-1679 |
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| Versions disponibles : | v1 (08-07-2009) | v2 (27-11-2009) |
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| A Numerical Exploration of Compressed Sampling Recovery |
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| Charles Dossal 1Gabriel Peyré 2 |
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| (03/2010) |
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| This paper explores numerically the efficiency of L1 minimization for the recovery of sparse signals from compressed sampling measurements in the noiseless case. This numerical exploration is driven by a new greedy pursuit algorithm that computes sparse vectors that are difficult to recover by L1 minimization. The supports of these pathological vectors are also used to select sub-matrices that are ill-conditionned. This allows us to challenge theoretical identifiability criteria based on polytopes analysis and on restricted isometry conditions. We evaluate numerically the theoretical analysis without resorting to Monte-Carlo sampling, which tends to avoid worst case scenarios. |
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| 1 : | Institut de Mathématiques de Bordeaux (IMB) |
| CNRS : UMR5251 – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II | |
| 2 : | CEntre de REcherches en MAthématiques de la DEcision (CEREMADE) |
| CNRS : UMR7534 – Université Paris IX - Paris Dauphine | |
| 3 : | Groupe de Recherche en Informatique, Image, Automatique et Instrumentation de Caen (GREYC) |
| CNRS : UMR6072 – Université de Caen – Ecole Nationale Supérieure d'Ingénieurs de Caen | |
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| Domaine | : | Mathématiques/Analyse numérique |
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| Compressed sensing – L1 minimization – restricted isometry constant – polytopes. |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00402455, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00402455 | |
| oai:hal.archives-ouvertes.fr:hal-00402455 | |
| Contributeur : Gabriel Peyré | |
| Soumis le : Vendredi 27 Novembre 2009, 14:46:13 | |
| Dernière modification le : Jeudi 21 Janvier 2010, 11:25:24 | |